A board foot is one square foot by one inch thick or 4 quarters (4/4). If you were using something thicker, then the square footage provided would be proportionately less. I.e. 8/4 lumber would yield...
Ummm, would you believe 1200 square feet?
A square foot is an area 1' x 1'
4 pounds
1. feet and foot means the same thing!